Us obstetric dating scan

In ultrasound scanning during pregnancy high frequency sound waves are used to make pictures of the inside of your body and your baby.Ultrasound has been used in pregnancy for over 35 years and there is no evidence that it is harmful. There are many reasons: You will need to have a full bladder for scans less than 14 weeks, but not at later stages of pregnancy.The scan can confirm the number of babies in the uterus, the embryo can be observed and measured by about five and a half weeks and a heartbeat usually detected by 6 weeks.

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You will be asked to lie on a couch and a water-based gel will be applied to your lower abdomen.

The ultrasonographer or consultant will move the probe over your abdomen while looking at pictures of your baby on a screen.

It is safe to use in pregnancy and from any age from birth to the elderly.

We welcome one adult to accompany you during your ultrasound examination.

Research shows that routine obstetric ultrasound before 24 weeks gestational age can significantly reduce the risk of failing to recognize multiple gestations and can improve pregnancy dating to reduce the risk of labor induction for post-dates pregnancy.

There is no difference, however, in perinatal death or poor outcomes for babies.

Internal scans (transvaginal) are generally only performed in very early pregnancy.

A dating scan is performed at your booking visit at 10-14 weeks of pregnancy.

The International Society of Ultrasound in Obstetrics and Gynecology (ISUOG) recommends that pregnant women have routine obstetric ultrasounds between 18 weeks and 22 weeks gestational age in order to confirm pregnancy timing, to measure the fetus so that growth abnormalities can be recognized quickly later in pregnancy, and to assess for congenital malformations and multiple gestations (i.e. Additionally, the ISUOG recommends that pregnant women have obstetric ultrasounds between 11 weeks and 13 weeks 6 days gestational age in countries with resources to perform them.

Performing an ultrasound at this early stage of pregnancy can more accurately confirm the timing of the pregnancy and can also assess for multiple fetuses and major congenital abnormalities at an earlier stage.

We provide pregnancy and gynaecology ultrasound examinations.

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